diff --git a/src/postgraphile-upsert.ts b/src/postgraphile-upsert.ts
index ce5f5600..75440381 100644
--- a/src/postgraphile-upsert.ts
+++ b/src/postgraphile-upsert.ts
@@ -32,6 +32,7 @@ export const PgMutationUpsertPlugin: Plugin = (builder) => {
       fields,
       pgIntrospectionResultsByKind.class
         .filter((table: any) => !!table.namespace)
+        .filter((table: any) => !omit(table, 'upsert'))
         .filter((table: any) => table.isSelectable)
         .filter((table: any) => table.isInsertable)
         .filter((table: any) => table.isUpdatable)